package org.dk.core.util;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author jiangjielong on 2016-12-16.
 * @version 1.0
 * <p>Spring ApplicationContext工具类</p>
 */
@Component
public class ApplicationContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    /**
     * 设置初始化ApplicationContext
     *
     * @param context
     */
    public void setApplicationContext(ApplicationContext context) {
        if (ApplicationContextUtil.applicationContext == null) {
            ApplicationContextUtil.applicationContext = context;
        }
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通过name获取 Bean.
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    //通过class获取Bean.
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    //通过name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}
